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EEE :: Electrostatics

  1. For making a capacitor, it is better to select a dielectric having

  2. A.

     low permittivity

    B.

     high permittivity

    C.

     permittivity same as that of air

    D.

     permittivity slightly more than that of air


  3. The power dissipated in a pure capacitor is

  4. A.

     zero

    B.

     proportional to applied voltage

    C.

     proportional to value of capacitance

    D.

     both (B) and (C) above


  5. When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

  6. A.

     remain uncharged

    B.

     decrease

    C.

     increase

    D.

     become zero


  7. Which of the following capacitors will have the least value of breakdown voltage ?

  8. A.

     Mica

    B.

     Paper

    C.

     Ceramic

    D.

     Electrolytic


  9. A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be

  10. A.

     10 F

    B.

     10 uF

    C.

     100 nF

    D.

     1000 uF


  11. In a capacitor the electric charge is stored in

  12. A.

     metal plates

    B.

     dielectric

    C.

     both (A) and (B)

    D.

     none of the above


  13. The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by

  14. A.

     CIR

    B.

     1/RC

    C.

     RC

    D.

     RIC


  15. A region around a stationary electric charge has

  16. A.

     An electric field

    B.

     A magnetic field

    C.

     Both (A) and (B)

    D.

     None of the above


  17. A gang condenser is a

  18. A.

     polarised capacitor

    B.

     variable capacitor

    C.

     ceramic capacitor

    D.

     none of the above


  19. Paper capacitors usually have a tolerance of

  20. A.

     ± 5%

    B.

     ± 10%

    C.

     ± 15%

    D.

     ± 20%